CVE-2026-1217 Yoast Duplicate Post has an Authenticated (Contributor+) Missing Authorization to Arbitrary Post Duplication and Overwrite
Authenticated attackers can duplicate or overwrite arbitrary posts, including private ones, due to missing capability checks in the Yoast Duplicate Post plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-1217?
CVE-2026-1217 is a medium-severity missing authorization vulnerability in Yoast Duplicate Post, published on 18 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Yoast Duplicate Post plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the clone_bulk_action_handler() and republish_request() functions in all versions up to, and including, 4.5. This makes it possible for authenticated attackers, with Contributor-level access and above, to duplicate any post on the site including private, draft, and trashed posts they shouldn't have access to. Additionally, attackers with Author-level access and above can use the Rewrite & Republish feature to overwrite any published post with their own content.
Weakness: CWE-862
Which versions are affected by CVE-2026-1217?
2 open source packages ship an affected version, including yoast/duplicate-post.
| Package | Affected | Fixed in |
|---|---|---|
yoast/duplicate-post Packagist | All versions | 4.6 |
yoast/duplicate-post Packagist | All versions | 4.6 |
How do I fix CVE-2026-1217?
Upgrade yoast/duplicate-post to 4.6 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1217 being exploited?
There is no known exploitation of CVE-2026-1217 in the wild and no public exploit code.
Sources
Also known as GHSA-g9w4-m5fx-x3wv.